A major difference between how Jewish monotheism understands Jesus to be God and man and how historical orthodox trinitarianism understands Jesus to be God and man
@soberxp is seen in the doctrine of the hypostatic union.
The orthodox doctrine was decided upon by the church at the Council of Chalcedon in AD 451 -> over 400 years after the death, burial and bodily resurrection of Jesus. That doesn’t necessarily make it wrong; it makes it an advancement in Christian understanding that goes beyond the primitive Christian understanding.
Jewish monotheism -> Jesus has only one nature, human; he is a human person. It is grounded on the Jewish law of agency rather than on the Christian doctrine of hypostatic union.
Historical orthodox trinitarianism -> Jesus has two natures, divine and human; he is a divine person, not a human person. The impersonal human nature is given personality by the divine person.
Both forms of monotheism are found in Christian history. One form (Jewish monotheism) is older than the other (trinitarian). The younger form eventually triumphed over and anathematized the older form. That’s church history.
You might be wondering where that leaves me as a Jewish monotheist who believes that Jesus of Nazareth is the Messiah. Stated positively, it leaves me welcome in the Jewish synagogue (as long as I don’t bring Jesus with me, which is not a viable option for me) and welcome in the Christian church (as long as I don’t bring the God of Jewish monotheism with me, which is not a viable option for me). Stated negatively, and in light of the fact that I’m unwilling to sear my conscience, it leaves me unwelcome and anathematized (cursed) by both the Jewish synagogue and the Christian church.
It’s a paradox, but such is the constraint of history.